Well, don't underestimate the ability of politicians to make a 180 degree turn in 3-degree increments. I sense that much is still negotiable, especially since "SmartTrack" is so nebulously defined. But yes, I fear that delivery of a subway has to happen or political careers will suffer.
If they could shave the headway to 10 minutes, it would be impossible to differentiate from any other TTC service. Headways less than 10 minutes become hard to measure or maintain anyways.
The one thing everyone seems to agree on is that LRT lines are needed radiating eastwards from Kennedy Station (On Eglinton, and perhaps up Kingston Road) and from STC (To Malvern, and other places). The ability to fund these in the "near" future seems to hang in the balance of whether to build lots of subway south or west of the STC. Logic would say any money that can be saved on subway construction can be turned towards those lines.
Extending the Bloor Subway appears to have only one real net benefit: making Scarborough a more attractive and convenient bedroom community for folks who want to work in the city center. Whereas serving growing development on Eglinton and on Sheppard potentially brings jobs to Scarboro and opens up the possibility that people might not need to commute downtown at all, and it connects Scarberians to places they can't easily reach today - such as North York, York University, Vaughan, and eastwards to Durham. So if subway has to happen, let it happen on Sheppard. Personally I would prefer LRT up there - seamless from Spadina to Malvern - but if it has to be subway to cater to Scarberian sensitivities, so be it. A Smarttrack/RER system that handles the north-of-Steeles commuters, and links STC to Kennedy, and provides an alternative to a Kennedy-Blooy/Yonge routing (thus giving some short term relief while the Relief Line is planned and funded and built) makes more sense to me than the SSE.
- Paul